Improvement in dies for seaming sheet-metal cases



I B. BUBKLEY. -Dies for Seaming Sheet-Metal Gas-as. "0,149,194; Patented March 31,1874.

UNITED STATES PATENT Crrron.

CHAUNCEY BUCKLEY, OF MERIDEN, CONNECTICUT, ASSIGNOR TO CHARLES PARKER, OF SAME PLACE.

IMPROVEMENT lN DIES FOR SEAMING SHEET-METAL CASES.

Specification forming part of Letters Patent No. 149, 194, dated March 31, 1874; application filed August 16, 1873.

To all whom it may concern:

Be it known that I, CHAUNCEY BUGKLEY, of Meriden, in the count-y of New Haven and State of Connecticut, have invented a new Improvement in Dies for Closing or Seaming Sheet-Metal Cases; and I do hereby declare the following, when taken in connect-ion with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specifi cation, and represent, in-

Figure 1, a perspective view of the upper portion of the die inverted; Fig. 2, a perspective view of the lower portion and in Figs. 3 and 4, vertical sections to illustrate the operation.

This invention relates to an improvement in dies for seaming and closing metal cases, such' as are used for spectacles, eyeglasses, matches, 820.; and it consists in constructing a die with a cavity of the form of one side of the case, with a narrow ledge extending around the cavity, corresponding to the scam in the case, and in width equal only to the seam, combined with a second die, having a cavity. corresponding to the cavity and ledge of the first, with a flange projecting down outside the said ledge so as to close over it, to operate as more fully hereinafter described.

I illustrate the invention as for forming eyeglass-cases; for spectacle and match cases the construction is the same, with the ex.

ception of being made longer for spectaclecases, and the ledge extending entirely around for match-cases, or cases which are formed alike at both ends and then out.

A is the lower die, in which is a cavity, B, corresponding to one side of the case, and

around the cavity a ledge, a, extends, as seen in Fig. 2. The side of the case for this die is formed, as seen in Fig. 5, from any suit-able metal, bent to form an angle, as at d, and the edge turned up, as at b, the ledge a corresponding to the flat portion between I) and d, which is to be the scam in the case. This blank is laid in the cavity of the die A, as seen in Fig. 3. The other side, as seen in Fig. 6, is formed with a flat edge, f, corresponding to the flat portion (1 of the other part, and so as to be placed therein, as seen in Fig. 3. The upper portion C of the die is formed with a cavity, D, corresponding to the other side of the case, and with a flat edge, a, around the cavity, corresponding to the ledge a. Around the die, outside the edge u, a flange, 71, projects downward, flaring or curved outward, as seen in Fig. 3. This die C isbrought down o er the other die, the flange h striking the edge I) of the metal, turning it inward until the edge a strikes it and closes it hard down upon the other portion of the case, forming a thin scam or edge around the case.

I claim as my invention The herein-described dies for closing or seaming sheet-metal cases, consisting of the two parts A and C, the part A constructed with a cavity, B, corresponding to one side of the case, and with the ledge (1. around said cavity, and the part C constructed with a cavity, D, corresponding to the other side of the case, and with the flat edge n, corresponding to the ledge a, and with the flange h, substantially as set forth.

CHAUNCEY BUCKLEY WVitnesses:

JOSEPH H. BECKETT, W. S. OHAPLIN. 

